<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>我的第一个网页</title>
</head>
<body>
<h1 align="center">一级标题</h1>
<h2 align="left">二级标题</h2>
<h3>三级标题</h3>
<h4>四级标题</h4>
<h5>五级标题</h5>
<h6>六级标题</h6>
<!--br是换行标签-->
<br>
<!--hr是分割线标签-->
<br>
<br>
<!--p是段落标签-->
<p>段落标签1</p >
<p>段落<br>标签2</p >

<p>
    <b>加粗</b>标签
    <br>
    <i>斜体</i>标签
    <br>
    <u>下划线</u>标签
    <br>
    <s>删除线</s>标签
</p >


</body>
</html>